A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Of five volcanoes located in the massive Tengger caldera, this cone is the youngest and most active.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

Enormous statue of the Emperor of the Mongols.

A brick building in Kathmandu's Durbar Square is home to Nepal's most prominent living goddess.

The oldest Hindu temple complex in Nepal serves as the seat of Nepal’s national deity, Lord Pashupatinath.

This historic square in Nepal is home to temples dating back to the third century.

This elegant neoclassical garden is a peaceful oasis in the middle of the Nepalese capital.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

2300-year-old Roman road connecting the empire.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A treasure trove of scientific instruments from the 17th and 18th centuries.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds.